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Mapper 9 (Punchout) & Mapper 71 (partial) support

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This commit is contained in:
Souryo 2014-06-28 18:50:01 -04:00
parent 200926f7e0
commit 83cddf637c
4 changed files with 106 additions and 0 deletions
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1
Core/Core.vcxproj
View file

@ -96,6 +96,7 @@
<ClInclude Include="IControlDevice.h" />
<ClInclude Include="IMemoryHandler.h" />
<ClInclude Include="Console.h" />
<ClInclude Include="MMC2.h" />
<ClInclude Include="Snapshotable.h" />
<ClInclude Include="IVideoDevice.h" />
<ClInclude Include="MapperFactory.h" />

3
Core/Core.vcxproj.filters
View file

@ -123,6 +123,9 @@
<ClInclude Include="AXROM.h">
<Filter>Header Files\Mappers</Filter>
</ClInclude>
<ClInclude Include="MMC2.h">
<Filter>Header Files\Mappers</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<ClCompile Include="CPU.cpp">

99
Core/MMC2.h Normal file
View file

@ -0,0 +1,99 @@
#include "stdafx.h"
#include "BaseMapper.h"
class MMC2 : public BaseMapper
{
private:
enum class MMC2Registers
{
RegA000 = 0xA,
RegB000 = 0xB,
RegC000 = 0xC,
RegD000 = 0xD,
RegE000 = 0xE,
RegF000 = 0xF
};
uint8_t _leftLatch;
uint8_t _rightLatch;
uint8_t _leftChrPage[2];
uint8_t _rightChrPage[2];
protected:
virtual uint32_t GetPRGPageSize() { return 0x2000; }
virtual uint32_t GetCHRPageSize() { return 0x1000; }
void InitMapper()
{
_leftLatch = 1;
_rightLatch = 1;
_leftChrPage[0] = 0;
_leftChrPage[1] = 0;
_rightChrPage[0] = 0;
_rightChrPage[1] = 0;
SelectPRGPage(0, 0);
SelectPRGPage(1, -3);
SelectPRGPage(2, -2);
SelectPRGPage(3, -1);
SelectCHRPage(0, 0);
SelectCHRPage(0, 1);
}
void StreamState(bool saving)
{
Stream<uint8_t>(_leftLatch);
Stream<uint8_t>(_rightLatch);
StreamArray<uint8_t>(_leftChrPage, 2);
StreamArray<uint8_t>(_rightChrPage, 2);
BaseMapper::StreamState(saving);
}
public:
void WriteRAM(uint16_t addr, uint8_t value)
{
switch((MMC2Registers)(addr >> 12)) {
case MMC2Registers::RegA000:
SelectPRGPage(0, value);
break;
case MMC2Registers::RegB000:
_leftChrPage[0] = value;
SelectCHRPage(0, _leftChrPage[_leftLatch]);
break;
case MMC2Registers::RegC000:
_leftChrPage[1] = value;
SelectCHRPage(0, _leftChrPage[_leftLatch]);
break;
case MMC2Registers::RegD000:
_rightChrPage[0] = value;
SelectCHRPage(1, _rightChrPage[_rightLatch]);
break;
case MMC2Registers::RegE000:
_rightChrPage[1] = value;
SelectCHRPage(1, _rightChrPage[_rightLatch]);
break;
case MMC2Registers::RegF000:
_mirroringType = ((value & 0x01) == 0x01) ? MirroringType::Horizontal : MirroringType::Vertical;
break;
}
}
virtual void NotifyVRAMAddressChange(uint16_t addr)
{
SelectCHRPage(0, _leftChrPage[_leftLatch]);
SelectCHRPage(1, _rightChrPage[_rightLatch]);
switch(addr & 0xFFF8) {
case 0x0FD8: _leftLatch = 0; break;
case 0x0FE8: _leftLatch = 1; break;
case 0x1FD8: _rightLatch = 0; break;
case 0x1FE8: _rightLatch = 1; break;
}
}
};

3
Core/MapperFactory.h
View file

@ -3,6 +3,7 @@
#include "AXROM.h"
#include "CNROM.h"
#include "MMC1.h"
#include "MMC2.h"
#include "MMC3.h"
#include "NROM.h"
#include "UNROM.h"
@ -19,6 +20,8 @@ class MapperFactory
case 3: return new CNROM();
case 4: return new MMC3();
case 7: return new AXROM();
case 9: return new MMC2();
case 71: return new UNROM(); //TODO: "It's largely a clone of UNROM, and Camerica games were initially emulated under iNES Mapper 002 before 071 was assigned."
}
throw std::exception("Unsupported mapper");